123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812 |
- /*
- * udebug - debug ring buffer library
- *
- * Copyright (C) 2023 Felix Fietkau <nbd@nbd.name>
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
- #define _GNU_SOURCE
- #include <sys/types.h>
- #include <sys/mman.h>
- #include <sys/socket.h>
- #include <unistd.h>
- #include <string.h>
- #include <stdio.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <poll.h>
- #include <time.h>
- #include "udebug-priv.h"
- #include "usock.h"
- #define ALIGN(i, sz) (((i) + (sz) - 1) & ~((sz) - 1))
- #ifndef MAP_ANONYMOUS
- #define MAP_ANONYMOUS MAP_ANON
- #endif
- #define UDEBUG_MIN_ALLOC_LEN 128
- static struct blob_buf b;
- static void __randname(char *template)
- {
- int i;
- struct timespec ts;
- unsigned long r;
- clock_gettime(CLOCK_REALTIME, &ts);
- r = ts.tv_sec + ts.tv_nsec;
- for (i=0; i<6; i++, r>>=5)
- template[i] = 'A'+(r&15)+(r&16)*2;
- }
- int udebug_id_cmp(const void *k1, const void *k2, void *ptr)
- {
- uint32_t id1 = (uint32_t)(uintptr_t)k1, id2 = (uint32_t)(uintptr_t)k2;
- if (id1 < id2)
- return -1;
- else if (id1 > id2)
- return 1;
- return 0;
- }
- static inline int
- shm_open_anon(char *name)
- {
- char *template = name + strlen(name) - 6;
- int fd;
- if (template < name || memcmp(template, "XXXXXX", 6) != 0)
- return -1;
- for (int i = 0; i < 100; i++) {
- __randname(template);
- fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
- if (fd >= 0) {
- if (shm_unlink(name) < 0) {
- close(fd);
- continue;
- }
- return fd;
- }
- if (fd < 0 && errno != EEXIST)
- return -1;
- }
- return -1;
- }
- static void __udebug_disconnect(struct udebug *ctx, bool reconnect)
- {
- uloop_fd_delete(&ctx->fd);
- close(ctx->fd.fd);
- ctx->fd.fd = -1;
- ctx->poll_handle = -1;
- if (ctx->reconnect.cb && reconnect)
- uloop_timeout_set(&ctx->reconnect, 1);
- }
- uint64_t udebug_timestamp(void)
- {
- struct timespec ts;
- uint64_t val;
- clock_gettime(CLOCK_REALTIME, &ts);
- val = ts.tv_sec;
- val *= UDEBUG_TS_SEC;
- val += ts.tv_nsec / 1000;
- return val;
- }
- static int
- __udebug_buf_map(struct udebug_buf *buf)
- {
- void *ptr, *ptr2;
- ptr = mmap(NULL, buf->head_size + 2 * buf->data_size, PROT_NONE,
- MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
- if (ptr == MAP_FAILED)
- return -1;
- ptr2 = mmap(ptr, buf->head_size + buf->data_size,
- PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, buf->fd, 0);
- if (ptr2 != ptr)
- goto err_unmap;
- ptr2 = mmap(ptr + buf->head_size + buf->data_size, buf->data_size,
- PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, buf->fd,
- buf->head_size);
- if (ptr2 != ptr + buf->head_size + buf->data_size)
- goto err_unmap;
- buf->hdr = ptr;
- buf->data = ptr + buf->head_size;
- return 0;
- err_unmap:
- munmap(ptr, buf->head_size + 2 * buf->data_size);
- return -1;
- }
- static int
- writev_retry(int fd, struct iovec *iov, int iov_len, int sock_fd)
- {
- uint8_t fd_buf[CMSG_SPACE(sizeof(int))] = { 0 };
- struct msghdr msghdr = { 0 };
- struct cmsghdr *cmsg;
- int len = 0;
- int *pfd;
- msghdr.msg_iov = iov,
- msghdr.msg_iovlen = iov_len,
- msghdr.msg_control = fd_buf;
- msghdr.msg_controllen = sizeof(fd_buf);
- cmsg = CMSG_FIRSTHDR(&msghdr);
- cmsg->cmsg_type = SCM_RIGHTS;
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_len = CMSG_LEN(sizeof(int));
- pfd = (int *) CMSG_DATA(cmsg);
- msghdr.msg_controllen = cmsg->cmsg_len;
- do {
- ssize_t cur_len;
- if (sock_fd < 0) {
- msghdr.msg_control = NULL;
- msghdr.msg_controllen = 0;
- } else {
- *pfd = sock_fd;
- }
- cur_len = sendmsg(fd, &msghdr, 0);
- if (cur_len < 0) {
- struct pollfd pfd = {
- .fd = fd,
- .events = POLLOUT
- };
- switch(errno) {
- case EAGAIN:
- poll(&pfd, 1, -1);
- break;
- case EINTR:
- break;
- default:
- return -1;
- }
- continue;
- }
- if (len > 0)
- sock_fd = -1;
- len += cur_len;
- while (cur_len >= (ssize_t) iov->iov_len) {
- cur_len -= iov->iov_len;
- iov_len--;
- iov++;
- if (!iov_len)
- return len;
- }
- iov->iov_base += cur_len;
- iov->iov_len -= cur_len;
- msghdr.msg_iov = iov;
- msghdr.msg_iovlen = iov_len;
- } while (1);
- /* Should never reach here */
- return -1;
- }
- static int
- recv_retry(int fd, struct iovec *iov, bool wait, int *recv_fd)
- {
- uint8_t fd_buf[CMSG_SPACE(sizeof(int))] = { 0 };
- struct msghdr msghdr = { 0 };
- struct cmsghdr *cmsg;
- int total = 0;
- int bytes;
- int *pfd;
- msghdr.msg_iov = iov,
- msghdr.msg_iovlen = 1,
- msghdr.msg_control = fd_buf;
- msghdr.msg_controllen = sizeof(fd_buf);
- cmsg = CMSG_FIRSTHDR(&msghdr);
- cmsg->cmsg_type = SCM_RIGHTS;
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_len = CMSG_LEN(sizeof(int));
- pfd = (int *) CMSG_DATA(cmsg);
- while (iov->iov_len > 0) {
- if (recv_fd) {
- msghdr.msg_control = fd_buf;
- msghdr.msg_controllen = cmsg->cmsg_len;
- } else {
- msghdr.msg_control = NULL;
- msghdr.msg_controllen = 0;
- }
- *pfd = -1;
- bytes = recvmsg(fd, &msghdr, 0);
- if (!bytes)
- return -2;
- if (bytes < 0) {
- bytes = 0;
- if (errno == EINTR)
- continue;
- if (errno != EAGAIN)
- return -2;
- }
- if (!wait && !bytes)
- return 0;
- if (recv_fd)
- *recv_fd = *pfd;
- else if (*pfd >= 0)
- close(*pfd);
- if (bytes > 0)
- recv_fd = NULL;
- wait = true;
- iov->iov_len -= bytes;
- iov->iov_base += bytes;
- total += bytes;
- if (iov->iov_len > 0) {
- struct pollfd pfd = {
- .fd = fd,
- .events = POLLIN
- };
- int ret;
- do {
- ret = poll(&pfd, 1, UDEBUG_TIMEOUT);
- } while (ret < 0 && errno == EINTR);
- if (!(pfd.revents & POLLIN))
- return -1;
- }
- }
- return total;
- }
- static void
- udebug_send_msg(struct udebug *ctx, struct udebug_client_msg *msg,
- struct blob_attr *meta, int fd)
- {
- struct iovec iov[2] = {
- { .iov_base = msg, .iov_len = sizeof(*msg) },
- {}
- };
- if (!meta) {
- blob_buf_init(&b, 0);
- meta = b.head;
- }
- iov[1].iov_base = meta;
- iov[1].iov_len = blob_pad_len(meta);
- writev_retry(ctx->fd.fd, iov, ARRAY_SIZE(iov), fd);
- }
- static bool
- udebug_recv_msg(struct udebug *ctx, struct udebug_client_msg *msg, int *fd,
- bool wait)
- {
- struct iovec iov = {
- .iov_base = msg,
- .iov_len = sizeof(*msg)
- };
- int ret;
- ret = recv_retry(ctx->fd.fd, &iov, wait, fd);
- if (ret == -2)
- __udebug_disconnect(ctx, true);
- return ret == sizeof(*msg);
- }
- static struct udebug_client_msg *
- __udebug_poll(struct udebug *ctx, int *fd, bool wait)
- {
- static struct udebug_client_msg msg = {};
- while (udebug_recv_msg(ctx, &msg, fd, wait)) {
- struct udebug_remote_buf *rb;
- void *key;
- if (msg.type != CL_MSG_RING_NOTIFY)
- return &msg;
- if (fd && *fd >= 0)
- close(*fd);
- if (!ctx->notify_cb)
- continue;
- key = (void *)(uintptr_t)msg.id;
- rb = avl_find_element(&ctx->remote_rings, key, rb, node);
- if (!rb || !rb->poll)
- continue;
- if (ctx->poll_handle >= 0)
- __atomic_fetch_or(&rb->buf.hdr->notify,
- 1UL << ctx->poll_handle,
- __ATOMIC_RELAXED);
- ctx->notify_cb(ctx, rb);
- }
- return NULL;
- }
- static struct udebug_client_msg *
- udebug_wait_for_response(struct udebug *ctx, struct udebug_client_msg *msg, int *rfd)
- {
- int type = msg->type;
- int fd = -1;
- do {
- if (fd >= 0)
- close(fd);
- fd = -1;
- msg = __udebug_poll(ctx, &fd, true);
- } while (msg && msg->type != type);
- if (!msg)
- return NULL;
- if (rfd)
- *rfd = fd;
- else if (fd >= 0)
- close(fd);
- return msg;
- }
- static void
- udebug_buf_msg(struct udebug_buf *buf, enum udebug_client_msg_type type)
- {
- struct udebug_client_msg msg = {
- .type = type,
- .id = buf->id,
- };
- udebug_send_msg(buf->ctx, &msg, NULL, -1);
- udebug_wait_for_response(buf->ctx, &msg, NULL);
- }
- static size_t __udebug_headsize(unsigned int ring_size, unsigned int page_size)
- {
- ring_size *= sizeof(struct udebug_ptr);
- return ALIGN(sizeof(struct udebug_hdr) + ring_size, page_size);
- }
- int udebug_buf_open(struct udebug_buf *buf, int fd, uint32_t ring_size, uint32_t data_size)
- {
- INIT_LIST_HEAD(&buf->list);
- buf->fd = fd;
- buf->ring_size = ring_size;
- buf->head_size = __udebug_headsize(ring_size, sysconf(_SC_PAGESIZE));
- buf->data_size = data_size;
- if (buf->ring_size > (1U << 24) || buf->data_size > (1U << 29))
- return -1;
- if (__udebug_buf_map(buf))
- return -1;
- if (buf->ring_size != buf->hdr->ring_size ||
- buf->data_size != buf->hdr->data_size) {
- munmap(buf->hdr, buf->head_size + 2 * buf->data_size);
- buf->hdr = NULL;
- return -1;
- }
- return 0;
- }
- int udebug_buf_init(struct udebug_buf *buf, size_t entries, size_t size)
- {
- uint32_t pagesz = sysconf(_SC_PAGESIZE);
- char filename[] = "/udebug.XXXXXX";
- unsigned int order = 12;
- uint8_t ring_order = 5;
- size_t head_size;
- int fd;
- INIT_LIST_HEAD(&buf->list);
- if (size < pagesz)
- size = pagesz;
- while(size > 1U << order)
- order++;
- size = 1 << order;
- while (entries > 1U << ring_order)
- ring_order++;
- entries = 1 << ring_order;
- if (size > (1U << 29) || entries > (1U << 24))
- return -1;
- head_size = __udebug_headsize(entries, pagesz);
- while (ALIGN(sizeof(*buf->hdr) + (entries * 2) * sizeof(struct udebug_ptr), pagesz) == head_size)
- entries *= 2;
- fd = shm_open_anon(filename);
- if (fd < 0)
- return -1;
- if (ftruncate(fd, head_size + size) < 0)
- goto err_close;
- buf->head_size = head_size;
- buf->data_size = size;
- buf->ring_size = entries;
- buf->fd = fd;
- if (__udebug_buf_map(buf))
- goto err_close;
- buf->hdr->ring_size = entries;
- buf->hdr->data_size = size;
- /* ensure hdr changes are visible */
- __sync_synchronize();
- return 0;
- err_close:
- close(fd);
- return -1;
- }
- static void *udebug_buf_alloc(struct udebug_buf *buf, uint32_t ofs, uint32_t len)
- {
- struct udebug_hdr *hdr = buf->hdr;
- hdr->data_used = u32_max(hdr->data_used, ofs + len + 1);
- /* ensure that data_used update is visible before clobbering data */
- __sync_synchronize();
- return udebug_buf_ptr(buf, ofs);
- }
- uint64_t udebug_buf_flags(struct udebug_buf *buf)
- {
- struct udebug_hdr *hdr = buf->hdr;
- uint64_t flags;
- if (!hdr)
- return 0;
- flags = hdr->flags[0];
- if (sizeof(flags) != sizeof(uintptr_t))
- flags |= ((uint64_t)hdr->flags[1]) << 32;
- return flags;
- }
- void udebug_entry_init_ts(struct udebug_buf *buf, uint64_t timestamp)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr;
- if (!hdr)
- return;
- ptr = udebug_ring_ptr(hdr, hdr->head);
- ptr->start = hdr->data_head;
- ptr->len = 0;
- ptr->timestamp = timestamp;
- }
- void *udebug_entry_append(struct udebug_buf *buf, const void *data, uint32_t len)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr;
- uint32_t ofs;
- void *ret;
- if (!hdr)
- return NULL;
- ptr = udebug_ring_ptr(hdr, hdr->head);
- ofs = ptr->start + ptr->len;
- if (ptr->len + len > buf->data_size / 2)
- return NULL;
- ret = udebug_buf_alloc(buf, ofs, len);
- if (data)
- memcpy(ret, data, len);
- ptr->len += len;
- return ret;
- }
- uint16_t udebug_entry_trim(struct udebug_buf *buf, uint16_t len)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr = udebug_ring_ptr(hdr, hdr->head);
- if (len)
- ptr->len -= len;
- return ptr->len;
- }
- void udebug_entry_set_length(struct udebug_buf *buf, uint16_t len)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr = udebug_ring_ptr(hdr, hdr->head);
- ptr->len = len;
- }
- int udebug_entry_printf(struct udebug_buf *buf, const char *fmt, ...)
- {
- va_list ap;
- size_t ret;
- va_start(ap, fmt);
- ret = udebug_entry_vprintf(buf, fmt, ap);
- va_end(ap);
- return ret;
- }
- int udebug_entry_vprintf(struct udebug_buf *buf, const char *fmt, va_list ap)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr;
- uint32_t ofs;
- uint32_t len;
- char *str;
- if (!hdr)
- return -1;
- ptr = udebug_ring_ptr(hdr, hdr->head);
- ofs = ptr->start + ptr->len;
- if (ptr->len > buf->data_size / 2)
- return -1;
- str = udebug_buf_alloc(buf, ofs, UDEBUG_MIN_ALLOC_LEN);
- len = vsnprintf(str, UDEBUG_MIN_ALLOC_LEN, fmt, ap);
- if (len <= UDEBUG_MIN_ALLOC_LEN)
- goto out;
- if (ptr->len + len > buf->data_size / 2)
- return -1;
- udebug_buf_alloc(buf, ofs, len + 1);
- len = vsnprintf(str, len, fmt, ap);
- out:
- ptr->len += len;
- return 0;
- }
- void udebug_entry_add(struct udebug_buf *buf)
- {
- struct udebug_hdr *hdr = buf->hdr;
- struct udebug_ptr *ptr = udebug_ring_ptr(hdr, hdr->head);
- uint32_t notify;
- uint8_t *data;
- /* ensure strings are always 0-terminated */
- data = udebug_buf_ptr(buf, ptr->start + ptr->len);
- *data = 0;
- hdr->data_head = ptr->start + ptr->len + 1;
- /* ensure that all data changes are visible before advancing head */
- __sync_synchronize();
- u32_set(&hdr->head, u32_get(&hdr->head) + 1);
- if (!u32_get(&hdr->head))
- u32_set(&hdr->head_hi, u32_get(&hdr->head_hi) + 1);
- /* ensure that head change is visible */
- __sync_synchronize();
- notify = __atomic_exchange_n(&hdr->notify, 0, __ATOMIC_RELAXED);
- if (notify) {
- struct udebug_client_msg msg = {
- .type = CL_MSG_RING_NOTIFY,
- .id = buf->id,
- .notify_mask = notify,
- };
- blob_buf_init(&b, 0);
- udebug_send_msg(buf->ctx, &msg, b.head, -1);
- }
- }
- void udebug_buf_free(struct udebug_buf *buf)
- {
- struct udebug *ctx = buf->ctx;
- if (!list_empty(&buf->list) && buf->list.prev)
- list_del(&buf->list);
- if (ctx && ctx->fd.fd >= 0)
- udebug_buf_msg(buf, CL_MSG_RING_REMOVE);
- munmap(buf->hdr, buf->head_size + 2 * buf->data_size);
- close(buf->fd);
- memset(buf, 0, sizeof(*buf));
- }
- static void
- __udebug_buf_add(struct udebug *ctx, struct udebug_buf *buf)
- {
- struct udebug_client_msg msg = {
- .type = CL_MSG_RING_ADD,
- .id = buf->id,
- .ring_size = buf->hdr->ring_size,
- .data_size = buf->hdr->data_size,
- };
- const struct udebug_buf_meta *meta = buf->meta;
- void *c;
- blob_buf_init(&b, 0);
- blobmsg_add_string(&b, "name", meta->name);
- c = blobmsg_open_array(&b, "flags");
- for (size_t i = 0; i < meta->n_flags; i++) {
- const struct udebug_buf_flag *flag = &meta->flags[i];
- void *e = blobmsg_open_array(&b, NULL);
- blobmsg_add_string(&b, NULL, flag->name);
- blobmsg_add_u64(&b, NULL, flag->mask);
- blobmsg_close_array(&b, e);
- }
- blobmsg_close_array(&b, c);
- udebug_send_msg(ctx, &msg, b.head, buf->fd);
- udebug_wait_for_response(ctx, &msg, NULL);
- }
- int udebug_buf_add(struct udebug *ctx, struct udebug_buf *buf,
- const struct udebug_buf_meta *meta)
- {
- list_add_tail(&buf->list, &ctx->local_rings);
- buf->ctx = ctx;
- buf->meta = meta;
- buf->id = ctx->next_id++;
- buf->hdr->format = meta->format;
- buf->hdr->sub_format = meta->sub_format;
- if (ctx->fd.fd >= 0)
- __udebug_buf_add(ctx, buf);
- return 0;
- }
- void udebug_init(struct udebug *ctx)
- {
- INIT_LIST_HEAD(&ctx->local_rings);
- avl_init(&ctx->remote_rings, udebug_id_cmp, true, NULL);
- ctx->fd.fd = -1;
- ctx->poll_handle = -1;
- }
- static void udebug_reconnect_cb(struct uloop_timeout *t)
- {
- struct udebug *ctx = container_of(t, struct udebug, reconnect);
- if (udebug_connect(ctx, ctx->socket_path) < 0) {
- uloop_timeout_set(&ctx->reconnect, 1000);
- return;
- }
- udebug_add_uloop(ctx);
- }
- void udebug_auto_connect(struct udebug *ctx, const char *path)
- {
- free(ctx->socket_path);
- ctx->reconnect.cb = udebug_reconnect_cb;
- ctx->socket_path = path ? strdup(path) : NULL;
- if (ctx->fd.fd >= 0)
- return;
- udebug_reconnect_cb(&ctx->reconnect);
- }
- int udebug_connect(struct udebug *ctx, const char *path)
- {
- struct udebug_remote_buf *rb;
- struct udebug_buf *buf;
- if (ctx->fd.fd >= 0)
- close(ctx->fd.fd);
- ctx->fd.fd = -1;
- if (!path)
- path = UDEBUG_SOCK_NAME;
- ctx->fd.fd = usock(USOCK_UNIX, path, NULL);
- if (ctx->fd.fd < 0)
- return -1;
- list_for_each_entry(buf, &ctx->local_rings, list)
- __udebug_buf_add(ctx, buf);
- avl_for_each_element(&ctx->remote_rings, rb, node) {
- if (!rb->poll)
- continue;
- rb->poll = false;
- udebug_remote_buf_set_poll(ctx, rb, true);
- }
- return 0;
- }
- void udebug_poll(struct udebug *ctx)
- {
- while (__udebug_poll(ctx, NULL, false));
- }
- struct udebug_client_msg *
- udebug_send_and_wait(struct udebug *ctx, struct udebug_client_msg *msg, int *rfd)
- {
- udebug_send_msg(ctx, msg, NULL, -1);
- return udebug_wait_for_response(ctx, msg, rfd);
- }
- static void udebug_fd_cb(struct uloop_fd *fd, unsigned int events)
- {
- struct udebug *ctx = container_of(fd, struct udebug, fd);
- if (fd->eof)
- __udebug_disconnect(ctx, true);
- udebug_poll(ctx);
- }
- void udebug_add_uloop(struct udebug *ctx)
- {
- if (ctx->fd.registered)
- return;
- ctx->fd.cb = udebug_fd_cb;
- uloop_fd_add(&ctx->fd, ULOOP_READ);
- }
- void udebug_free(struct udebug *ctx)
- {
- struct udebug_remote_buf *rb, *tmp;
- struct udebug_buf *buf;
- free(ctx->socket_path);
- ctx->socket_path = NULL;
- __udebug_disconnect(ctx, false);
- uloop_timeout_cancel(&ctx->reconnect);
- while (!list_empty(&ctx->local_rings)) {
- buf = list_first_entry(&ctx->local_rings, struct udebug_buf, list);
- udebug_buf_free(buf);
- }
- avl_for_each_element_safe(&ctx->remote_rings, rb, node, tmp)
- udebug_remote_buf_unmap(ctx, rb);
- }
|